prop-2-yn-1-yl 2,3-dideoxy-6-O-(tert-butyldimethylsilyl)-2,3,4-trideoxy-4-[2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl]-α-D-erythro-hex-2-enopyranoside 、
ethyl 6-O-(tert-butyldimethylsilyl)-2,3,4-trideoxy-4-[5-iodo-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl]-α-D-erythro-hex-2-enopyranpside 在
palladium diacetate
copper(l) iodide 、
三乙胺 、
三苯基膦 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 2.0h,
以51%的产率得到5-[3-[[(2S,3S,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-3-(2,4-dioxopyrimidin-1-yl)-3,6-dihydro-2H-pyran-6-yl]oxy]prop-1-ynyl]-1-[(2S,3S,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-ethoxy-3,6-dihydro-2H-pyran-3-yl]pyrimidine-2,4-dione